The Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the mantle is the thickest layer, while the crust is the thinnest layer.
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Answer:
The correct answer is option - B) osteoporosis.
Explanation:
Osteoporosis is the group of various diseases in which resorption is more than the bone deposit. In this disease, bones become porous and light that leads to bones to become fragile and prone to fractures.
The composition is not changed and the matrix remains the same however the mass of the bone decline. This is found more often in aged people.
Thus, the correct answer is option B. osteoporosis.
Answer:
The main outputs are oxygen, which is released into the air, and glucose sugar (chemical energy), which is used to keep the plant alive.
Explanation:
Answer:
The answer is; D
Archaebacteria are early life forms on earth. They utilized the process of chemosynthesis to make organic molecules from inorganic molecules and for energy. The word archae means ‘ancient’ life forms. These single-celled organisms evolved around sulfur-rich environments of the hydrothermal vents.
